Foldable napkin holder



FIG. 1 is a top plan of a foldable napkin holder showing our new ornamental design;

FIG. 2 is a front elevation view of a foldable napkin holder showing our new ornamental design; and,

FIG. 3 is side elevation view of a foldable napkin holder showing our new ornamental design.

The broken lines in the Figures depict environmental features and form no part of the claimed design. 

CLAIM The ornamental design for a foldable napkin holder, as shown and described. 